Practice MCQ Questions and answers on Chemistry-GK

Carbon dioxide and Methane contributes to the 'Green House Effect'.

Coal workers' pneumoconiosis (CWP), commonly known as "black lung disease," occurs when coal dust is inhaled.

Some of the methods of solid waste disposal and management are :
➤ Open burning
➤ Dumping into the sea
➤ Sanitary Landfills
➤ Incineration
➤ Composting
➤ Ploughing in fields
➤ Hog feeding
➤ Grinding and discharging into sewers
➤ Salvaging
➤ Fermentation and biological digestion
Bricketting that involves the solidification of preprocessed municipal solid waste into fuel pellets or briquettes is the least preferred method of solid waste disposal.

Although the Germans were the first to use phosgene on the battlefield, it became the primary chemical weapon of the Allies. Phosgene was responsible for 85% of chemical-weapons fatalities during World War I. Mustard gas, a potent blistering agent, was dubbed King of the Battle Gases.

Ozone depletion occurs when chlorofluorocarbons (CFCs) and halons—gases formerly found in aerosol spray cans and refrigerants—are released into the atmosphere.

Ozone depletion occurs when chlorofluorocarbons (CFCs) and halons—gases formerly found in aerosol spray cans and refrigerants—are released into the atmosphere.

Ozone depletion occurs when chlorofluorocarbons (CFCs) and halons—gases formerly found in aerosol spray cans and refrigerants—are released into the atmosphere.

The gaseous air pollutants of primary concern in urban settings include sulfur dioxide, nitrogen dioxide, and carbon monoxide; these are emitted directly into the air from the combustion of fossil fuels.Smoke, a collection of airborne solid and liquid particulates and gases emitted when a material undergoes combustion, is also a pollutant. Hydrocarbon is an organic compound consisting entirely of hydrogen and carbon.

Methyl bromide- is considered to be a significant ozone depleting substance (ODS) by atmospheric scientists. While methyl bromide is a natural substance, the additional methyl bromide added to the atmosphere by humans contributes to the thinning of the ozone layer, allowing increased UV radiation to reach the earth’s surface, with potential impact not only to human health and the environment, but to agricultural crops as well.

The threshold limit value (TLV) of copper in atmospheric air is 1.0 mg/m³.